Nexus S will be available after December 16 for purchase as unlocked or with a T-Mobile service plan online, and in-store from all Best Buy and Best Buy Mobile stores in the United States. And after December 20 at Carphone Warehouse and Best Buy retailers in the U.K.

Customers in US will be able to purchase Nexus S for $529 as an unlocked phone without a contract. Nexus S optimized for T-Mobile’s network is available for $199 with a two-year service agreement and qualifying voice and data plan. In UK, at £35 on contract, and £549 for the unlocked version.

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